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Minimum Length for Brass

Discussion in '10mm Reloading Forum' started by 99blkta, Aug 3, 2010.

  1. 99blkta

    99blkta

    68
    0
    Jun 26, 2010
    TX
    So after a few firings I've noticed that my brass has begun to shrink. Is there a minimum case length?
     
  2. jeffreybehr

    jeffreybehr Silver Member

    765
    2
    Mar 14, 2009
    Phoenix, AZ USA
    Don't you have a reloading manual? The trim-to length of the 10mm Auto is 0.982".
     


  3. 99blkta

    99blkta

    68
    0
    Jun 26, 2010
    TX
    Yea, I have two reloading manuals; however, I was unaware that the trim to length is the same as the minimum cartridge length. I'm still new to this and am trying to learn as much as possible. Thanks for the info.
     
    Last edited: Aug 4, 2010
  4. Taterhead

    Taterhead Counting Beans

    3,595
    107
    Dec 13, 2008
    Boise, Idaho
    Yep. 0.982 is the minimum. I may fudge that by a couple of thousandths at the most - but only for my "volume" loads.
     
  5. jeffreybehr

    jeffreybehr Silver Member

    765
    2
    Mar 14, 2009
    Phoenix, AZ USA
    YW, and sorry I sounded a bit abrupt.
     
  6. 99blkta

    99blkta

    68
    0
    Jun 26, 2010
    TX
    Not a problem, and thanks again for all the info.
     
  7. 99blkta

    99blkta

    68
    0
    Jun 26, 2010
    TX
    Other than trash the brass that is too short, what can be done with it? Trim it down to .40 lengths?
     
  8. Taterhead

    Taterhead Counting Beans

    3,595
    107
    Dec 13, 2008
    Boise, Idaho
    This has certainly been done, but certainly not preferable. The .40 S&W case is not exactly a shortened 10mm case. There are subtle case dimension differences, and the .40 calls for a small primer.

    I just toss 'em. They are less than 14 cents each from Starline, so not a huge loss to toss one out.
     
  9. 99blkta

    99blkta

    68
    0
    Jun 26, 2010
    TX
    Thanks, all I needed to know. :cool:

    Although its slightly disappointing that some of these cases only have 2 firings, eh oh well.
     
  10. Taterhead

    Taterhead Counting Beans

    3,595
    107
    Dec 13, 2008
    Boise, Idaho
    Interesting. What type of brass? I haven't experienced anything less than 4-5 shots, and that is with Winchester brass. Others, especially Starline, last longer. Granted, I only shoot hot loads in new brass - then they are relegated to the mid-strength rotation. So I am not as hard on my brass as some guys.
     
    Last edited: Aug 7, 2010
  11. 99blkta

    99blkta

    68
    0
    Jun 26, 2010
    TX
    All my brass has been new DT nickel plated. I do as you have stated and only load maximum recommended loads in the new brass, after that they are just used for "volume" loads. I'm quite surprised as well that I've only loaded some of these cases 2x. :wow: